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參數(shù)資料
| 型號： | MAX1777-MAX1999 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers |
| 中文描述： | 高效率，四路輸出，主電源用于筆記本電腦控制器 |
| 文件頁數(shù)： | 16/32頁 |
| 文件大?。?/td> | 497K |
| 代理商： | MAX1777-MAX1999 |
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M
High-Effic ienc y, Quad Output, Main Power-
S upply Controllers for Notebook Computers
16
______________________________________________________________________________________
MAX1977 is optimized for “thin and light” applications with a
5V/400kHz SMPS and a 3.3V/500kHz SMPS. The MAX1999
provides a pin-selectable switching frequency, allowing
either 200kHz/300kHz or 400kHz/500kHz operation of the
5V/3.3V SMPSs, respectively.
Light-load efficiency is enhanced by automatic Idle
Mode operation, a variable-frequency pulse-skipping
mode that reduces transition and gate-charge losses.
Each step-down, power-switching circuit consists of two
N-channel MOSFETs, a rectifier, and an LC output filter.
The output voltage is the average AC voltage at the
switching node, which is regulated by changing the duty
cycle of the MOSFET switches. The gate-drive signal to
the N-channel high-side MOSFET must exceed the
battery voltage, and is provided by a flying-capacitor
boost circuit that uses a 100nF capacitor connected to
BST_.
MAX1777/
MAX1977/
MAX1999
LDO5
DL3
CS3
(MAX1777/
MAX1977)
ILIM3
FB3
OUT3
LDO3
ON3
ON5
SHDN
PRO
2.91V
3V
LINEAR
REG
POWER-ON SEQUENCE/
CLEAR FAULT LATCH
EN3
THERMAL
SHUTDOWN
5V
LINEAR
REG
2V
REFERENCE
3.3V
SMPS PWM
CONTROLLER
5V
SMPS PWM
CONTROLLER
4.56V
PGOOD3
PGOOD5
PGOOD
LDO5
BST5
DH5
LX5
EN5
DL5
CS5
(MAX1777/
MAX1977)
ILIM5
FB5
OUT5
LDO5
V
CC
REF
V+
GND
TON
(MAX1999 ONLY)
BST3
DH3
LX3
Figure 3. Detailed Functional Diagram
Idle Mode is a trademark of Maxim Integrated Products, Inc.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1977 | High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers |
| MAX1999 | High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers |
| MAX1977EEI | High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers |
| MAX1999EEI | High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers |
| MAX1778 | 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1778EUG | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1778EUG+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Quad-Output TFT LCD w/Buffer RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1778EUG+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Quad-Output TFT LCD w/Buffer RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1778EUG-T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1778EVKIT | 功能描述:電源管理IC開發(fā)工具 MAX1778/80/81/82 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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